Metals and Non-Metals

Metals are known as ………... elements because they can form ………. ions by losing electrons.

• Electronegative, negative

• Electropositive, positive

• Electropositive, negative

• Electronegative, positive

Which property of metals is used for making bells and strings of musical instruments like Sitar and Violin?

• Sonorosity

• Malleability

• Ductility

• Conductivity

1. The poorest conductor of heat among metals is

• Lead

• Mercury

• Calcium

• Sodium

Which of the following non-metal is lustrous?

a) Sulphur b) Oxygen

c) Nitrogen d) Iodine

• Sulphur

• Oxygen

• Nitrogen

• Iodine

Generally, non-metals are not conductors of electricity. Which of the following is a good conductor of electricity?

• Diamond

• Graphite

• Sulphur

• Fullerene

The non-metal which is liquid at room temperature is:

• Mercury

• Bromine

• Carbon

• Helium

Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?

(A) Good thermal conductivity (B) Good electrical conductivity C) Ductility (D) High melting point

• A & B

• A & C

• B & C

• A & D

An element X is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in air. It reacts vigorously with water. Identify the element from the following

• Mg

• Na

• C

• Ca

Example of an amphoteric oxide is:

• Na₂O

• K₂O

• Al₂O₃

• MgO

Al₂O₃ + 2NaOH → ….............… + H₂O

• Al (OH)₃

• Na₂O

• NaAlO₂

• AlNaO₂